[builtins] implement Array.prototype.includes in TurboFan

src/runtime/runtime-array.cc

Index: src/runtime/runtime-array.cc
diff --git a/src/runtime/runtime-array.cc b/src/runtime/runtime-array.cc
index 6664c814006798046ef7a6ffa279788e04146a49..d451b96e1bbf5772923c3cec2549725bac6caa13 100644
--- a/src/runtime/runtime-array.cc
+++ b/src/runtime/runtime-array.cc
@@ -32,18 +32,24 @@ RUNTIME_FUNCTION(Runtime_FinishArrayPrototypeSetup) {
 }
 
 static void InstallCode(Isolate* isolate, Handle<JSObject> holder,
-                        const char* name, Handle<Code> code) {
+                        const char* name, Handle<Code> code, int argc = -1) {
   Handle<String> key = isolate->factory()->InternalizeUtf8String(name);
   Handle<JSFunction> optimized =
       isolate->factory()->NewFunctionWithoutPrototype(key, code);
-  optimized->shared()->DontAdaptArguments();
+  if (argc < 0) {
+    optimized->shared()->DontAdaptArguments();
+  } else {
+    optimized->shared()->set_internal_formal_parameter_count(argc);
+  }
   JSObject::AddProperty(holder, key, optimized, NONE);
 }
 
 static void InstallBuiltin(Isolate* isolate, Handle<JSObject> holder,
-                           const char* name, Builtins::Name builtin_name) {
+                           const char* name, Builtins::Name builtin_name,
+                           int argc = -1) {
   InstallCode(isolate, holder, name,
-              handle(isolate->builtins()->builtin(builtin_name), isolate));
+              handle(isolate->builtins()->builtin(builtin_name), isolate),
+              argc);
 }
 
 RUNTIME_FUNCTION(Runtime_SpecialArrayFunctions) {
@@ -59,6 +65,7 @@ RUNTIME_FUNCTION(Runtime_SpecialArrayFunctions) {
   InstallBuiltin(isolate, holder, "unshift", Builtins::kArrayUnshift);
   InstallBuiltin(isolate, holder, "slice", Builtins::kArraySlice);
   InstallBuiltin(isolate, holder, "splice", Builtins::kArraySplice);
+  InstallBuiltin(isolate, holder, "includes", Builtins::kArrayIncludes, 2);
 
   return *holder;
 }
@@ -439,5 +446,24 @@ RUNTIME_FUNCTION(Runtime_ArraySpeciesConstructor) {
       isolate, Object::ArraySpeciesConstructor(isolate, original_array));
 }
 
+// ES7 22.1.3.11 Array.prototype.includes
+RUNTIME_FUNCTION(Runtime_ArrayIncludes_Slow) {
+  HandleScope shs(isolate);
+  DCHECK(args.length() == 3);
+  CONVERT_ARG_HANDLE_CHECKED(Object, search_element, 1);
+  CONVERT_ARG_HANDLE_CHECKED(Object, from_index, 2);
+
+  // Let O be ? ToObject(this value).
+  Handle<JSReceiver> object;
+  ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
+      isolate, object, Object::ToObject(isolate, handle(args[0], isolate)));
+
+  // Rest of the algorithm...
+  Maybe<bool> result =
+      JSReceiver::IncludesValue(isolate, object, search_element, from_index);
+  MAYBE_RETURN(result, isolate->heap()->exception());
+  return isolate->heap()->ToBoolean(result.FromJust());
+}
+
 }  // namespace internal
 }  // namespace v8